I had created new tables but when I click update model from database, the new tables werent added. I tried setting primary keys and all, but it couldnt work too. And when I click the update model from database, in the dialog box, the "add" column, I selected Table but none of the tables stated there. So when I click finish, none of the new tables is being added to the model. I dont know why my tables not shown in the add column. Anyone know what is wrong with it?
Can't comment yet so I'll ask my question as an answer. Under the add tab, did you check the checkboxes for the table that you wanted to add? Secondly after you have added do you see your tables in the edmx file?
Related
I am using Entity Framework version 4.0, I want to delete one column from the .edmx model. Because my development database contains one newly added column and my server database still doesn't have that column right now. So how can I solve this issue while publishing my code to my server?
You should always have a version of the published code and the database model that belong to that code.
In the model, if you select the column in the table you can right click and choose "delete from model" which remove the column
The Entity data model can not be auto-updated so when making changes on the database you have to update the .edmx by :
Right click on the diagram -> Update model from database -> select 'Add' then 'tables' finally on button 'Finish'.
Tell us if it's resolved.
I am opening the WebStoreDBModel.edmx file. Inside of the file I right click Update Model from Database. There I am in the ADD tab, but I cannot select the TABLES or anything else (Views or Stored Procedures and Functions). I have a dababase with 3 tables connected together (Category, Cart, Product). Can someone explain me why I am not able to regenerate the model ? I need to regenerate because When I am trying to Add a new Controller it display No Model Classses are available. Please check that the project has been compiled. I did DEBUG / BUILD my project. Any idea ?
If you haven't created any new objects( tables/functions etc..) since you created the EDMX file for the last time,then "Add" tab won't allow you to select anything. You need to use the "Refresh" tab.
If you added a new column to the existing table/updated a column in an existing table, You should use the "Refresh" tab.
I am writing my first database application in c# and I have to use MS Access database, I have two tables Invoice and Order the order table is a child table. Invoice is a parent table it has key column "InvoiceNumber" which is auto column and it has a one to many relation with Order table column "InvoiceNumber". The problem I am having is that I got an exception at the line
tableAdapterManager.UpdateAll(database1DataSet);
when I try to add a new row and click save,
"You cannot add or change a record because a related record is required in table 'Invoice'."
I tried to search but I am unable to find it any help for ms access database, most of them are of SQL database. I also found one solution to edit the relation in the dataset designer to select the option "Both relation and foreign key constraints" but it didnot work for me either.
Thanks
Make sure that your OleDbParameters are properly set and in the correct corresponding order as the columns in the tables in the database. If you use Visual Studio automated code generation for data sources when you add a database, then drag and drop a table onto a form, check out the <database name>DataSet.Designer.cs file. It will teach you all you need to know.
I'm newbie with .NET Entity Framework 4.0 I'm using VS2010 and I created the EDMX file and then added my Entities in this model. After I've finished my Datamodel and set the Asscociation, I right click on and choose Generate DB from model.
Then it creates SQL scripts *.sql then I open the SQL and right click on Execute SQL Statements... What happens is all my tables are re-created...
ISSUE: All my test data in MasterData Tables are removed/deleted. I need to add the data back again manually...
I googled on "keep data generated Data model EDMX" etc. but couldn't find... Can someone advice me how I can avoid this problem?
Because I've e..g 15 MasterDataTable + other tables linked with these and I need to re-add the records back manually for all these tables... and 9 of 10 case I don't touch those tables in UI.
please advice how I can avoid this situation.
thanks
You can update the model from the database (the reverse way you are taking now):
Double click the .edmx file to open the designer. In the middle of the designer, right click to show the contextual menu and click "update model from database". It will prompt a screen, check the DB parameters and click next. Now, you're in a sreen with TABS. The first tab is for adding tables as entities to the model. The second tab will its for update the model. Select the tables and views you need to add/update and click next. That's all.
I am using ADO.NET Entity Data Model in my C# project. There is an ADO.NET Entity Data Model that is generated on the DB in my project. How do I quickly refresh the ADO.NET Entity Data Model based on DB changes? I have been deleting the model and then creating a new one. I believe that there is a more simple and quick way.
Right-click on the model designer and choose "Update Model from Database", and a dialog box will pop up. Click OK and your model will be refreshed.
FYI, I'm using EF 4.0, and I skipped the earlier version, so I can't tell you what it's like in VS 2008.
Update Model from Database doesn't work very well. At least in VS 2008/C# 3.5. I fails to remove old columns, etc.
I always Ctrl-A (to select everything), the press delete, and then create model from database from scratch - update just doesn't work right in a lot of cases. At least in EF4 / VS2010 that I am developing in/with.
Perhaps this helps... Update Model Wizard (Entity Data Model Tools)
You should open your Model.edmx after that right click on the properties. now select the (Update Model from Database) and it will going to show you another panel with tab panel. you can choose Add,Refresh and delete. in your current situation, you should select Refresh. then select Tables->dbo->and name of your table in database and then click finish. that's it. you've refresh your table.
but sometimes you can see in your model that something went wrong because the column is not in right position. to solve that just right click the column name and select 'UP' to move it up or 'DOWN' to bring it down.
i hope that it will help.
Right click - Update Model from Database.